1. Child and Adolescent Intellectual Disability Screening Questionnaire (CAIDS-Q) McKenzie & Paxton
Dr Karen McKenzie

2. Contents
Why to we need a screening tool for adolescents with a learning disability?
What makes a good screening tool?
Description of the CAIDS-Q
Uses of the CAIDS-Q?
Developing the CAIDS-Q: Validity and reliability
Contact details

3. Why is there a need for a screening tool?
Policy recommendations have led to a demand on services to identify young people with an intellectual disability as early as possible e.g. in forensic settings
Full diagnostic assessments are expensive, time-consuming and need to be carried out by properly qualified, applied psychologist
Cost to individual and society if adequate support is not given

4. What makes a good screening tool?
Cost effective
Quick and simple to administer and score
Requires minimal training
Valid i.e. Measures what it sets out to measure
Reliable i.e. Gives consistent results across time and different users

5. Description of the CAIDS-Q
Has 7 items
Can be completed with/by the individual or by someone who knows him/her well
Takes 5-15 minutes to complete
Can be sent to referrers to complete
Easy to score
No training required
Covers age range 8-18 years

6. Uses The CAIDS-Q can potentially help to:
Quickly identify appropriate services for an individual
Avoid a long wait for initial assessment
Allow resources to be targeted at those who need them most
Identify people who may be vulnerable e.g. within criminal justice system
Provide a means for discriminating between groups for research purposes
Help GPs identify those with an intellectual disability within their practice

7. Developing the Questionnaire
Literature search for existing tools
Selecting the questions
Standardisation,Validity & Reliability
Easy to use
Research base

8. Standardisation
Developed to distinguish between those people who are typically referred to intellectual disability and child and adolescent mental health services
Also included a forensic sample

9. Validity
The CAIDS-Q score correlated significantly with WISC IV scores
The CAIDS-Q scores could discriminate between those with an intellectual disability and those without
A ROC analysis showed the CAIDS-Q could identify people with an intellectual disability with 97% accuracy and those without with 86% to 87% accuracy (depending on the age of the individual)
Small forensic sample (n=23) found CAIDS-Q correctly identified all those with and without an intellectual disability.

10. Reliability
Inter-rater reliability was significant for each item on the questionnaire.
(It was excellent for all 7 items)

11. References
McKenzie, K., Paxton, D., Murray, G.C., Milanesi, P., & Murray, A.L . (2012)The evaluation of a screening tool for children with an intellectual disability: The Child and Adolescent Intellectual Disability Screening Questionnaire. Research in Developmental Disabilities. 33,
McKenzie, K., Megson, P. & Paxton, D. (2008) The development of a child learning disability screening questionnaire: A pilot study. Learning Disability Practice, 11(5), 18-22

12. For more information For more information contact GCM Records:
Or Karen McKenzie